The difference between the Currie 9-inch housing on the left and the Currie High-Pinion on the right is startling. The 9-inch has a removable pinion support, but the pinion location is the big difference. The 9-inch unit has the pinion located 2 1/4 inches below the axle centerline, which is lower than a standard Dana 44 or 60. The Currie High-Pinion is 1 1/2 inches above the centerline, 1/4 inch higher than the high-pinion Dana styles. This gives an incredible 3 3/4-inch gain in pinion height from the stock 9-inch rearend.